A Key Performance Indicator to Assess the Frequency Stability of Wind Generation Dominated Power System

Rakhshani, Elyas; Gusain, Digvijay; Sewdien, Vinay; Rueda, José L.; Meijden, Mart A. M. M. van der

doi:10.1109/access.2019.2940648

Cited by 48 publications

(34 citation statements)

References 31 publications

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“…Other more sophisticated indicators such as estimated time-domain frequency nadir, restoration time [28], and combinations thereof have also been used [13], [29].…”

Section: A Inertial Responsementioning

confidence: 99%

Practical Framework for Frequency Stability Studies in Power Systems With Renewable Energy Sources

et al. 2020

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The transition from power systems dominated by synchronous machines to systems based on converter-based generation technologies (CGTs), is weakening currently robust power systems by reducing system inertia with the replacement of synchronous generators with low-inertia CGTs. From a frequency stability viewpoint, this is resulting in faster frequency dynamics and more frequent and larger frequency excursions after system contingencies, thus significantly affecting the stability of power systems dominated by CGTs, requiring detailed stability assessments to ensure the secure integration of CGTs. In this paper, a practical framework is presented for frequency stability studies based on time domain simulations of power systems with CGTs. A fundamental part of the proposed approach is the use of a filter to first identify worst-case scenarios among various possible system operating conditions. Once these worst-case scenarios are identified, a clustering technique is used to select representative worst-case operating conditions to evaluate the frequency stability of the system using time-domain simulations. The effectiveness of the proposed framework is demonstrated on the Chilean Northern Interconnected System (NIS), where it is shown that the proposed filter is able to quickly identify worst-case scenarios for further study. Moreover, we show that the selected representative operating conditions cover a wide-range of worst-case frequency responses, demonstrating the effectiveness of the proposed tool for frequency stability analyses.

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“…Other more sophisticated indicators such as estimated time-domain frequency nadir, restoration time [28], and combinations thereof have also been used [13], [29].…”

Section: A Inertial Responsementioning

confidence: 99%

Practical Framework for Frequency Stability Studies in Power Systems With Renewable Energy Sources

et al. 2020

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“…Frequency stability is the ability of a power system to maintain steady-state frequency, following a severe system disturbance, resulting in a significant imbalance between generation and load [1]- [4]. It depends on the ability to restore the equilibrium between system generation and load demand with minimum loss of loads.…”

Section: Implementation and Performance Assessment Of Fast Active Powmentioning

confidence: 99%

Implementation and Performance Assessment of Fast Active Power Injection Method for Type 4 Wind Turbine based on Real-time Simulation

Rakhshani

Veerakumar

Ahmad

et al. 2019

2019 2nd International Conference on Smart Grid and Renewable Energy (SGRE)

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This paper deals with the implementation of a Fast Active Power Injection (FAPI) controller in a Type-4 Wind Turbine. Two different FAPI controllers, droop-based and a modified derivative-based controller are proposed and investigated under real-time simulation platform. The implementation is done in a Real-Time Digital Simulator (RTDS) by using the functionalities of RSCAD software. The IEEE 9 bus system is taken as a case study to quantitatively check the suitability of the implemented controller. The response of the wind turbine observed in EMT simulations is compared against the response obtained via numerical simulations with a generic wind turbine model built-in DIgSILENT PowerFactory software. The details of the model implemented in RSCAD provides better insight on capturing the impacts of controller parameters. Obtained results clearly demonstrate how the proposed controller can effectively improve the dynamic frequency performance of the power system.

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“…The concept of a virtual synchronous generator has been proposed to improve the frequency stability in a power system with high IBDG penetration [8]. In [9], a key performance indicator was proposed to measure the frequency stability limit in a system with high penetration of power-electronic-interfaced generators. This study improved the frequency nadir (NADIR) using the fast frequency response of wind turbine generators.…”

Section: Introductionmentioning

confidence: 99%

Determining the Capacity Limit of Inverter-Based Distributed Generators in High-Generation Areas Considering Transient and Frequency Stability

2020

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The responses of an inverter-based distributed generator (IBDG) to abnormal voltage and frequency are different from those of a conventional generator owing to the difference in the operating modes. In particular, the momentary cessation (MC) mode deteriorates the transient stability of normal power systems by ceasing to provide active and reactive power to the grid. However, in a high-generation area, where a significant amount of generation is concentrated and where transient instability exists under a contingency, MC operation is conducive to the transient stability because the electrical output of critical generators increases to cover the local loads under this condition. This effect can cause frequency instability if a sizeable portion of the IBDG output is lost owing to the operating modes. To ensure transient and frequency stability, this study analyzed the effects of operating modes and generator tripping on the highgeneration area. A method for determining the capacity limit of the IBDGs in the high-generation area was then developed to ensure power system stability. The effectiveness and feasibility of the proposed method were verified by conducting a case study on the Korean power system. INDEX TERMS Frequency nadir, inverter-based distributed generator, momentary cessation, power system frequency stability, power system transient stability, single-machine equivalent.

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A Key Performance Indicator to Assess the Frequency Stability of Wind Generation Dominated Power System

Cited by 48 publications

References 31 publications

Practical Framework for Frequency Stability Studies in Power Systems With Renewable Energy Sources

Practical Framework for Frequency Stability Studies in Power Systems With Renewable Energy Sources

Implementation and Performance Assessment of Fast Active Power Injection Method for Type 4 Wind Turbine based on Real-time Simulation

Determining the Capacity Limit of Inverter-Based Distributed Generators in High-Generation Areas Considering Transient and Frequency Stability

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